I Had Incredimail Before Free Version For Years.problem Not Pc Savy. Every Time

I had a problem with PC I changed email address . Never shut off other ones. I want to use it again but I need to delete all the other ones. They are all from same house address. My last email address was [email protected].  others [email protected]  There are many more. I don't want to download Incredimail the other ones are not  shut off.I did not know you had to shut off. My adult children went to sites I did not approve of. Also this is new PC. But my same house address. Can you help me please. I am 54 , I have learned a little more about PC. Kittengirl03 was another one. I love incredimail. I have to lock my PCin a room so adult children can't touch it. They know more than me. Can you shut down my other sites.I fear problems. Can you answer Please